Commit d3e61457 authored Aug 03, 2011 by Tord Andersson Committed by David S. Miller Aug 04, 2011

macb: restore wrap bit when performing underrun cleanup



When TX underrun occurs, a cleanup is performed that marks all buffers
as used. As a side effect it also clears the wrap bit in the last
buffer. This patch will restore the wrap bit.

Signed-off-by: Tord Andersson <tord.andersson@endian.se>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 36c35416

drivers/net/macb.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -322,6 +322,9 @@ static void macb_tx(struct macb *bp)
		for (i = 0; i < TX_RING_SIZE; i++)
		bp->tx_ring[i].ctrl = MACB_BIT(TX_USED);

		/* Add wrap bit */
		bp->tx_ring[TX_RING_SIZE - 1].ctrl \|= MACB_BIT(TX_WRAP);

		/* free transmit buffer in upper layer*/
		for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) {
		struct ring_info *rp = &bp->tx_skb[tail];

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